firmware: arm_scmi: Unwind P2A receiver mailbox setup failure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93082
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:02 UTC
Updated2026-09-17 17:18:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Unwind P2A receiver mailbox setup failure mailbox_chan_setup() can request an additional P2A receiver channel after successfully acquiring the primary P2A channel. If that later request fails, the function returns immediately and leaves the primary channel allocated. Unwind the primary mailbox channel before returning the error so probe deferral or other setup failures do not leave the channel busy for later probe attempts.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.101470000 (date 2026-09-18)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 4c2a5d72357e5c6743c23b59615da287140d9d31 git Not specified
CNA Linux Linux affected fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 3b0b02134ab90202af80b102fa37196b9689e86f git Not specified
CNA Linux Linux affected fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 3515aed7fe424b79c49ff9cd51f7802a64a4ab7b git Not specified
CNA Linux Linux affected fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3b0b02134ab90202af80b102fa37196b9689e86f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3515aed7fe424b79c49ff9cd51f7802a64a4ab7b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4c2a5d72357e5c6743c23b59615da287140d9d31 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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